Multiple stage process for preparing mixed hydroxyalkylcellulose

Details Multiple stage process for preparing mixed hydroxyalkylcellulose Multiple stage process for preparing mixed hydroxyalkylcellulose

1983-09-22

1984-06-26

Griffin, Ronald W.

Organic compounds -- part of the class 532-570 series

Organic compounds

Carbohydrates or derivatives

536 90, C08B 11193

Patent

active

044567510

ABSTRACT:
Mixed hydroxyalkyl cellulose ethers are prepared in a multi-stage etherification process, for example, hydroxyethylmethylcellulose is prepared by reacting alkali cellulose sequentially with ethylene oxide, methyl chloride, ethylene oxide and methyl chloride to form a product having uniform substitution. Products made by this process have improved solubility and other properties.

REFERENCES:
patent: Re24116 (1956-01-01), Klug
patent: 2831852 (1958-04-01), Savage
patent: 2835666 (1958-05-01), Savage
patent: 3296247 (1967-01-01), Klug
patent: 3839319 (1974-10-01), Greminger et al.
patent: 4096325 (1978-06-01), Teng et al.
patent: 4292426 (1981-09-01), Orii et al.

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